25/4-9 S
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General information
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Wellbore history
GeneralThe primary target for well 25/4-9 S was a prospect of Paleocene age called Klegg, approximately 11 km north-northeast of the Heimdal field, and four km south-southwest of Vale.Operations and resultsWildcat well 25/4-9 S was spudded with the semi-submersible installation Deepsea Delta on 5 September 2003 and drilled to TD at 2377 m in the Paleocene Heimdal Formation. It was drilled deviated with a maximum deviation of 23.6 deg at 1609 m. The first two hole sections (36" and 17 1/2 ") were drilled with seawater. The 12 1/4" hole section was drilled with Versavert OBM, while the 8 1/2" hole section (reservoir section) was drilled with NaCl WBM.The Heimdal Formation reservoir was encountered at 2236 m with 61 meters gross sand (55.9 m net). The sand had very good reservoir properties and was oil bearing. Production from the nearby Heimdal and Frigg fields had caused depletion of the regional aquifer by approximately 18 bars. A Free Water Level was interpreted to be at 2297 m (2197.4 m TVD MSL), but this is probably affected by the production pressure depletion.Two MDT runs were carried out. Representative oil and water samples, and a large volume of oil were recovered from the Heimdal Formation. One core was cut from 2239.2 m to 2256.5 m close to top of the Heimdal Formation.The well was permanently abandoned on 29 September 2003 as an oil discovery (the Vilje Discovery).TestingNo drill stem test was performed. -
Cuttings at the Norwegian Offshore Directorate
Cuttings at the Norwegian Offshore Directorate Cuttings available for sampling?YESCuttings at the Norwegian Offshore Directorate Cutting sample, top depth [m]Cutting samples, bottom depth [m]1100.002377.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12237.02254.5[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]17.5Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1100.0[m]DCRRI1120.0[m]DCRRI1140.0[m]DCRRI1160.0[m]DCRRI1180.0[m]DCRRI1200.0[m]DCRRI1220.0[m]DCRRI1240.0[m]DCRRI1260.0[m]DCRRI1280.0[m]DCRRI1300.0[m]DCRRI1320.0[m]DCRRI1340.0[m]DCRRI1360.0[m]DCRRI1370.0[m]DCRRI1380.0[m]DCRRI1390.0[m]DCRRI1400.0[m]DCRRI1410.0[m]DCRRI1420.0[m]DCRRI1430.0[m]DCRRI1440.0[m]DCRRI1450.0[m]DCRRI1460.0[m]DCRRI1480.0[m]DCRRI1500.0[m]DCRRI1520.0[m]DCRRI1540.0[m]DCRRI1560.0[m]DCRRI1580.0[m]DCRRI1610.0[m]DCRRI1630.0[m]DCRRI1650.0[m]DCRRI1670.0[m]DCRRI1690.0[m]DCRRI1710.0[m]DCRRI1730.0[m]DCRRI1750.0[m]DCRRI1770.0[m]DCRRI1790.0[m]DCRRI1810.0[m]DCRRI1830.0[m]DCRRI1850.0[m]DCRRI1870.0[m]DCRRI1890.0[m]DCRRI1910.0[m]DCRRI1930.0[m]DCRRI1950.0[m]DCRRI1970.0[m]DCRRI1990.0[m]DCRRI2010.0[m]DCRRI2030.0[m]DCRRI2050.0[m]DCRRI2060.0[m]DCRRI2067.0[m]DCRRI2080.0[m]DCRRI2090.0[m]DCRRI2100.0[m]DCRRI2110.0[m]DCRRI2120.0[m]DCRRI2130.0[m]DCRRI2140.0[m]DCRRI2150.0[m]DCRRI2160.0[m]DCRRI2170.0[m]DCRRI2180.0[m]DCRRI2190.0[m]DCRRI2200.0[m]DCRRI2210.0[m]DCRRI2220.0[m]DCRRI2230.0[m]DCRRI2230.0[m]DCFUGRO2237.1[m]CRRI2237.9[m]CRRI2245.4[m]CRRI2245.8[m]CRRI2246.4[m]CRRI2246.5[m]CFUGRO2246.6[m]CFUGRO2246.8[m]CFUGRO2247.0[m]CPETROSTR2247.1[m]CRRI2247.3[m]CFUGRO2247.5[m]CRRI2247.9[m]CRRI2248.0[m]CFUGRO2248.5[m]CFUGRO2249.1[m]CRRI2250.0[m]CPETROSTR2250.1[m]CRRI2250.3[m]CFUGRO2250.5[m]CFUGRO2250.9[m]CFUGRO2260.0[m]DCRRI2265.0[m]DCRRI2270.0[m]DCRRI2275.0[m]DCRRI2280.0[m]DCRRI2285.0[m]DCRRI2290.0[m]DCRRI2300.0[m]DCRRI2310.0[m]DCRRI2315.0[m]DCRRI2320.0[m]DCRRI2325.0[m]DCRRI2330.0[m]DCRRI2335.0[m]DCRRI2340.0[m]DCRRI2345.0[m]DCRRI2350.0[m]DCRRI2355.0[m]DCRRI2360.0[m]DCRRI2365.0[m]DCRRI2370.0[m]DCRRI2375.0[m]DCRRI2377.0[m]DCRRI -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit1494609589581158134621502150216721942236 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.30 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf1.48 -
Documents – reported by the production licence (period for duty of secrecy expired)
Documents – reported by the production licence (period for duty of secrecy expired) Document nameDocument formatDocument size [MB].pdf3.36.PDF5.48 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]MDT GR22402335MDT GR22942294MWD - CDR GR RES DIR2202236MWD - GVR6 ARC GR RES DIR22362377SP DSI HRLA PEX1462377VSP GR8002370 -
Casing and leak–off tests
Casing and leak–off tests Casing typeCasing diam.
[inch]Casing depth
[m]Hole diam.
[inch]Hole depth
[m]LOT/FIT mud eqv.
[g/cm3]Formation test typeCONDUCTOR30145.036149.00.00LOTSURF.COND.13 3/81080.017 1/21086.01.45LOTINTERM.9 5/82231.012 1/42236.01.40LOTOPEN HOLE2377.08 1/22377.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured2971.30WATER BASED9541.30WATER BASED10671.2720.0OIL BASED16661.3529.0OIL BASED21851.3525.0OIL BASED22361.3523.0OIL BASED22551.2512.0WATER BASED23771.2411.0WATER BASED -
Pressure plots
Pressure plots The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.Pressure plots Document nameDocument formatDocument size [MB]pdf0.22